Author/Authors :
Venugopal Thiruvengadam نويسنده Department of Chemistry, Government College of Engineering, Salem-636011, India , Kannan kolanthi نويسنده Department of Chemistry, Government College of Engineering, Salem-636011, India , Zulfareen Nasarullnah نويسنده Department of Chemistry, Government College of Engineering, Salem-636011, India
Abstract :
Inhibition of corrosion of mild steel by ethanol extract of Prosopis Juliflora was studied by both potentiodynamic method and weight loss method. A 24 full factorial design was performed to determine the optimal condition of corrosion inhibition and to determine the variable which affects the inhibition of corrosion of mild steel by the ethanol extract of Prosopis Juliflora. The variable that was studied were concentration of the medium (HCl, 0.1 M and 1 M), concentration of the inhibitor (100 ppm and 700 ppm), temperature (303 K and 333 K) and time (1h and 5 h). A linear mathematical model was applied to the experimental results, to determine the effect of each variables and their relationship were determined. Statistical analysis such as ANNOVA (Analysis of Variance), F-test and student t-test, surface analysis were carried out in experimental data and the results indicated that the effect of the temperature is greatest followed by the concentration of the inhibitor and least effect was shown by the concentration of the time. Concentration of medium on the corrosion inhibition of mild steel by ethanol extract of Prosopis Juliflora was found to show a negative effect. The statistical model was found to have most excellent fit with high coefficient of determination (R2=0.997) for the inhibition of corrosion. The effect of the factor on the Corrosion inhibition was also investigated by the response surface methodology (RSM) based on Box-Behnken design (BBD)
